Does anyone know why Angelo Caruso stepped down after Maranzano's death?

Now he Maranzana named a Angelo Cruiso as his underboss. After he name all the bosses he said if anyone wants to know or ask any question they could do so now, of course, there were a lot of questions asked who could remember. As he had named Angelo Cruiso, one of the boys could had been anyone like the Doc, Buster of Joe Profaci, told me that when Mr. Marnazano named Angelo for his underboss, Angelo was going to take off because he felt that he did not earn it. So I asked why was he going to take off and he told me he didn't do a thing in the war, he wasn't even on the lam with us so I asked and why did Maranzano name him. He explained you see Mr. Maranzano is nobody fool. He put him there so he can be his yes man. Oh I see I said. Now the meeting is over and we go on living and hanging out on Lexington.